diff --git tools/inetcat.c tools/inetcat.c
index b306a47..74bb91b 100644
--- a/tools/inetcat.c
+++ b/tools/inetcat.c
@@ -21,6 +21,9 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
+#ifndef fd_set
+#include <sys/select.h>
+#endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdint.h>
